Diamond-drill bit



Nov. 3, 192 1,560,490

M. E. YOUNG DIAMOND DRILL BIT Filed Sept. 4, 192

' Patented Nov. 3, 1925.

UNITED STATES MINAL E. YOUNG. OF CASPER, WYOMING.

DIAMOND-DRILL BIT.

Application filed Septemlier 4, 1924. Serial No. 735,948.

To alZ whom it may concern:

Be it known that I, MINAL E. YOUNG, a

' citizen of the United States, residing at Casper, in'the county ofNatrona and State 'of Wyoming, have invented certain new and usefulImprovements in Diamond-Drill Bits, of which the following is aspecification, reference being had to the accompanying drawings.

This invention relates to certain improvements in diamond drill bits andhas relation more particularly to a bit of this kind comprising acylindrical member having cutting diamonds set in its working-endportion and projecting beyond the inner and outer surfaces thereof, andit is an object of the invention to provide novel and improved meanswhereby diamonds projecting beyond the outer surface of themember areeffectively protected against excessive wear, abrasion, breakage orbeing torn out of their seatings when lowering the bit through hard rockor a casing.

Another object of the invention is to rovide a diamond drill bit withoutstan ing flanges positioned in close proximity to the v. diamonds andwhich operate to keep the diamonds from striking the hard surface of acasing or hard rock which would cause breakage of the diamonds duringthe process of lowering or extracting the bit.

The invention consists in the details of" construction and in thecombination and arrangement of the several parts of my improved diamonddrill bit whereby certain important advantages are attained and thedevice rendered simpler, less expensive and otherwise more convenientand advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitelyclaimed. 7

In order that my invention may be the better understood, 1 will nowproceed to describe the same with reference to theaccompanying drawings,wherein Figure 1 is a longitudinal sectional view taken through a bitconstructed in accordancewith an embodiment of my invention;

Figure 2 is a view in plan of the bottom or working end of the bit asherein disclosed.

As disclosed in the accompanyin ings, B denotes a hollow cylindrical iithaving one end ortion provided with the external thread 1 whereby thebit may be draw properlyengaged with the rods and lowered into a drillhole. The bit B has seated in its lower or working end portion in awellknown manner. the diamonds 2, said diamonds 2 projecting beyond theouter and inner surfaces of the bit B.

When a bit of this type is lowered into a drilt hole the diamonds 2projecting beyond the outer surface or circumference of the bit aresubject to excessive wear,- abrasion, breakage, and are' sometimes tornout of their seatings in the bit through rubbing or striking against theinside of the drill hole. When the drill hole hasbeen lined with ironpipe or casing, the bit B has to be lowered with the outer diamonds 2 inactual contact with the more or less roughened inner surface of thispipe or casing. If the casing. is broken, bent, roughened, or collapsed,it

is often impossible to use a diamondfbitwithout a costly" loss ofdiamonds. This condition is accentuated in the deeper drill holes, as inoil well drilling, where several thousand feet of easing are oftenemployed and the bit B has to be lowered and raised through this lengthof casing.

To avoid these manifest objections and to I protect these outer diamonds2, I provide on the outer surface or periphery of the bit B directlyabove said outer diamonds 2 or the settings therefor the outstandingflanges 3 disposed lengthwise of the bit with the outer ends thereof inrelatively close proximity to the. outer or workin end of the bit. Theseflanges 3 extend outwardly from the periphery or circumference of thebit an appreciable distance beyond the cutting edges of the outerdiamonds 2. This provlsion of the flanges 3 gives absolute protection tothese outer diamonds 2 against the objections and disadvantageshereinbefore referred to. This is due to the fact that all the wear orstriking against the wall of the drill hole or the pipe or casing isupon the inexpensive flanges 3 rather than upon the expensive dia-'vmonds 2.

These flanges 3 may be of any size, shape or cross section that willadequately protect such outer diamonds 2 and said flanges may beintegral with the bit or the flanges may be made separate and afiixed tothe bit in any manner desired. These flanges may also be made of a metaltempered harder or softer than the bit itself as the use in a hole mayrequire.

particular 1 In lowering, these flanges 3 may be slightly worn down andsubsequent rotation at the bottom of the hole will further wear themdown, the amount of this wear, however, being dependent on the hardnessto which the flanges are tempered. These flanges should be tempered justhard enough and project just far enough beyond the outer diamonds 2 sothat suflicient portions of the flanges 3 will remain to protect thediamonds when the bit is being raised out of the hole.

From the foregoing description it is thought to be obvious that adiamond drill bit constructed in accordance with my invention isparticularly well adapted for use by reason of the convenience andfacility with which it may be assembled and operated, and it will alsobe obvious that my invention is susceptible of some change andmodification without departing from the principles and spirit thereofand for this reasonI do not wish to be understood as limiting myself tothe precise arrangement and formation of the severalparts herein shownin carrying out my invention in practice except as hereinafter claimed.

flanges of soft metal I claim 1. The combination with a drill bit havingdiamonds projecting beyond its periphery at the Working end thereof, ofprotecting carried by the bit and projecting outwardly beyond thediamonds, said flangesbeing arranged above the diamonds.

2. The combination with a drill bit having diamonds projecting beyondits eriphery at the working end thereof,- of protecting flanges of softmetal carried by the bit and projecting outwardly beyond the diamonds,

sa1d flanges being arranged above 'the diamonds and terminating inrelatively close proximity thereto.

3. A combination with a drill bithaving diamonds at the working endthereof, of protecting flanges ofsoft metal carried by the bit andprojecting outwardly beyond the diamonds, said flanges being arrangedabove the diamonds and terminating in relatively close proximitythereto.

In testimony whereof I hereunto afiix my signature.

MINAL E. YOUNG.

